Conductive polymer composites obtained from recycled poly(carbonate) and rubber blends for heating and sensing applications
Conductive polymer composites obtained from recycled poly(carbonate) and rubber blends for heating and sensing applications
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DOI：
10.1002/pat.776
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发表时间：
2006-09
影响因子：
3.4
通讯作者：
K. Zribi;J. Feller;K. Elleuch;A. Bourmaud;B. Elleuch
中科院分区：
文献类型：
--
作者：
K. Zribi;J. Feller;K. Elleuch;A. Bourmaud;B. Elleuch
导电聚合物复合材料（CPC）可以通过将绝缘聚合物基体与导电填料共混来获得。当实现分散颗粒的渗滤时，可以获得用于通过焦耳效应自调节加热的敏感材料。为了适应耐用的发展理念，只有回收材料被用于设计CPC，即从信号板上切下的聚碳酸酯（PC）颗粒和从汽车轮胎上压碎的橡胶颗粒。的CPC的导电性能进行了研究，以确定渗滤条件和导电性水平方面的加热和传感应用。使用[聚碳酸酯-炭黑]80%/粉碎橡胶20%CPC，即（PC-CB）80/CR20 m/m，在120°C以上获得高幅度正温度系数（PTC）效应，允许自调节加热。这一结果值得注意，因为文献中没有报道关于无定形热塑性基质如PC的其他结果。在炭黑（CB）和粉碎的橡胶（CR）颗粒之间发现了积极的协同作用，其充当PTC助推器。然而，已经导电的橡胶颗粒必须通过添加至少5%v/v CB来掺杂以实现更高的导电性。与（PC-CB）/CR CPC获得的响应幅度是足够大的，以允许感测，并具有良好的选择性对研究的蒸气（甲苯和二氯甲烷），大CR颗粒被发现更适合于这种应用。版权所有© 2006约翰威利父子有限公司。
Conductive polymer composites (CPCs) can be obtained by blending an insulating polymer matrix with conductive fillers. When the percolation of the dispersed particles is achieved, it is possible to obtain a sensible material for self-regulated heating by the Joule effect. To fit the durable development concept only recycled materials have been used to design CPCs, i.e. poly(carbonate) (PC) pellets cut out from signal panels and crushed rubber particles from car tires. The conductive properties of the CPCs have been investigated to determine the percolation conditions and the conductivity level with regard to heating and sensing applications. High amplitude positive temperature coefficient (PTC) effects are obtained with [poly(carbonate)-carbon black]80%/crushed rubber 20% CPC, i.e. (PC-CB)80/CR20 m/m, over 120°C allowing self-regulated heating. This result is noteworthy as there are no other results reported in the literature for amorphous thermoplastic matrices like PC. A positive synergy is found between carbon black (CB) and crushed rubber (CR) particles, which act as a PTC booster. Nevertheless, rubber particles already conductive must be doped by the addition of at least 5% v/v CB to achieve higher conductivities. The response amplitudes obtained with (PC-CB)/CR CPC are large enough to allow sensing and have a good selectivity towards the studied vapors (toluene and dichloromethane); large CR particles are found to be more suitable for this application. Copyright © 2006 John Wiley & Sons, Ltd.